Automatic weighing-machine.



PATENTED DEC. s, 1903.

E. G. THOMAS.- AUTOMATIG WEIGHING MACHINE.

APPLICATION FILED 20, 1898.

a sums-sum 1.

N0 MODEL.

INVENTOR WITNESSES PATENTED DEC. 8, 1903.

E. G. THOMAS.

AUTOMATIC WEIGrHIlTG MACHINE.

APPLICATION FILED MAY 20, 1898. H0 IODEL. 3 SHEETS-SHEET 2.

INVEN/TOR W h-NEssEs J'- 7v,

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PATENTED DEC. 8, 1903.

E. G. THOMAS.

AUTOMATIC WEIGHING MACHINE.

APPLICATION nun 20 1590. no MODEL. In a snnnrs-snnm a.

INVENTOR WITNESSES emptied by the weight of a counterbalance or UNITEDSTATES Patented December 8, 1903.

PATENT OFFICE.

EDWARD G. THOMAS, OF BOSTON, MASSACHUSETTS, ASSIGNOR, BY MESNEASSIGNMENTS, TO AUTOMATIC VVEIGHING MACHINE COMPANY, OF NEW YORK, N. Y.,A CORPORATION OF NEWV YORK.

AUTOMATIC WElGHlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 746,200, dated December8, "1903 Application filed May 20, 1898. Serial No. 681.264. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD G. THOMAS, a citizen of the United States,residing at Boston, in the county of Sufiolk and State of Massachusetts,have invented certain new and usefulImprovementsinAutomaticWeighing-Machines, of which the following is a specification.

My invention is intended to provide an improved automaticweighing-machine of that type in which the moving parts are actuatedwholly by power derived from the weight of the material which passesthrough the apparatus as distinguished from weighing-machines of thepower-driven type. In machines of the latter class the contents of theweighing-bucket or other receptacle at the time of the completion of afull load is not ordinarily relied upon to perform any function otherthan that of tilting the scale-beam, whereby very accurate results areobtainable by reason of the elimination of sources of error, such asfrictional or other resistance to the descent of the loaded receptacle,when such movement is relied upon to effect the cutting off of thesupply of material to the receptacle.

It is a main object of my present invention to secure without the use ofpositive driving mechanism the accurate results obtainable frompower-drivenmachines; and to this end I provide a valve or otherflow-controlling device and means constantly tending to close the samewhen open, in combination with devices for opening'the valve, which areoperated after the weighing-bucket or other receptacle has received afull load and has been other force which has been made operative forsuch purpose by the downward movement of the receptacle in such mannerthat at the time of the completion of each load the scalebeam is free tomove uninfluenced by any resistance except that of a device forreleasing and permitting the final closing of the valve, whichresistance may be made so slight as to be negligible.

My invention also comprises improved means for dumping theweighing-bucket, as well as certain other subordinate featureshereinafter set forth.

An automatic weighing-machine embodying a preferred form of my inventionis illustrated in the accompanying drawings, which are to some extentdiagrammatic and are not intended to represent the exact details ofcommercial construction.

In said drawings, Figures 1, 2, and 3represent in side elevation oneform of machine in three different positions assumed during one completeoperation. Fig. 4 is a fragmentary View, in side elevation, showing amodified construction. 7 Fig. 5 is a rear elevation of a portion of themachine shown in Fig. 1 in the same position. Fig. 6 is a view in sideelevation of a portion of a modified form of machine provided with adevice for governing the number of complete operations which the machinewill perform automatically after being started, and Fig. 7 is asectional view of the governing device shown in Fig. 6.

Weighing-machines as hitherto constructed have in many cases beenprovided with means for effecting a partial closing of the valve whichcontrols the delivery of material to the weighing-bucket before a fullload has been obtained in order that the bulk of the material might bedelivered to the scale at a rapid rate, the rate of flow at the time ofthe final closing of the valve being thus diminished in order that moreaccurate 8o weights might be obtained, and in the machiue shown in thedrawings the same principle is embodied, although the main features ofmy invention are applicable to weighingmachines in which no intermediateposition of the valve is provided for.

Referring now to the drawings,the machine shown therein comprises aweighing-bucket 1, supported on a scale-beam 2 by means of knife-edges3, and provided with a bottom go adapted to be opened at the proper timeto discharge the material weighed. This bottom is preferably composed oftwo sections 4 and 5, pivoted,respectively,to opposite sides of thebucket and so connected by a link 6 5 that they will open and close inunison. One of the sections 5 is provided with means, such as a weight51, for closing the bottom of the bucket after it has been emptied andwith an arm 7, arranged to be engaged when said I00 bottom is closed bya latch 8, pivoted on the bucket. The scale-beam 2 is provided with aweighing-weight 52 and with knife edges 9, and is supported by thelatter, as hereinafter described.

To the upper part of the framework of the machine is secured a chute 16,through which material is delivered to the bucket 1 from any suitablesource of supply. The flow of material through this chute is controlledby suitable means, such as aswinging valve 17, rigidly secured to ashaft 18, journaled on the framework of the machine, said valve beingprovided with means constantly tending to close it, such as a spring 19,secured thereto and to some stationary part of the machine and soadjusted as always to be under tension. Means are thus provided forclosing the valve which are Wholly independent of the weight of thematerial weighed and of the movements of the receptacle 1, so that byholding said valve open or partly open until a full load has beendelivered and utilizing the movement of the scale thereby producedmerely to efiect the release of the valverestraining device I am able toobtain, within certain limits, results of the same degree of accuracy asthose heretofore obtained from power-driven machines. For opening thevalve in opposition to the closing device 19 and bringing it into aposition wherein the restraining device will act upon it I utilize theenergy developed by the downward movement of the material weighed, andin order that the movements of the scale-beam 2 on its knife-edges 9 maynot be hampered or affected in any way by the valve-opening mechanism Imount said scale-beam on an independentlymovable support, thevalveopening mechanism being connected to said support and operatedthereby. This support may consist of an oscillatory table 10, pivoted tothe sides 11 11 of the framework of the machine and counterbalanced bymeans, such as a spring 12, secured thereto and to a hook 13, which ispreferably adjustable. The movements of the support 10 during the actionof the machine are limited by tixed stops let and 15. In place of thespring 12 acounterbalancing-weight 63 (shown in dotted lines in Fig. 1)may be employed, if desired, the support 10 thus forming, in efiect, aseparate scale-beam.

The valve-opening mechanism operated by the support 10, as shown inFigs. 1 to 5, inclusive, consists of a link 22, pivoted at one end, asat 23, to the support 10, and provided at its other end with a slotthrough which projects a pin 21, attached to an arm 20,which is securedto and moves with the shaft 18. These parts are so proportioned thatwhen the support 10 is in its lowest position the valve 17 will be freeto close if permitted so to do, while upon the upward movement of saidsupport said valve will be opened by the engagement of the pin 21 by thelink 22 at the lower end of the slot formed therein, and

when thus opened will remain open until the support descends again.According to the construction shown in said figures the valve 17 willbegin its closing movement as soon as the support 10 commences todescend, which descent by suitably adjusting the spring 12 or thecounterweight 63 is caused to occur as soon as the greater part of aload has been delivered to the bucket 1, and for the purpose of holdingsaid valve open to a slight extent until the full load has beencompleted I provide an arresting device by means of which the valve isheld in what may be called the drip-stream position until by themovement of the scale-beam 2 upon the completion of the load saidarresting device is released and the valve is allowed to close. As shownin Figs. 1, 2, and 3, this arresting device consists of an arm 28,journaled loosely upon the shaft 18 and provided with an armature 29 andan arc-shaped extension 30, which extension has a hook at its lower endadapted to engage a lug 31, secured to the valve 17. An electromagnet 32is supported on the framework of the machine and so located that whenenergized it will attract and hold the armature 29 when the arm 28 is inthe position shown in Figs. 1, 3, and 6, the valve 17 being thenprevented from closing beyond the drip-stream position by the engagementof the lug 31 with the hooked end of the arm 30. A spring 33, lightenough to be overpowered easily by the spring 19, tends at all times todraw the armature 29 against the magnet 32, and said magnet is includedin an electric circuit comprising wires 34, a battery 35, and acircuit-breaker 36, which is carried by the support 10 and preferablycon sists of a pivoted lever 37, normally resting upon and makingcontact with a post 38, mounted upon an insulating-block 39, the parts37 and 38 being respectively connected with the wires 34. The weightedend of the scale-beam 2 is provided wit h a projection etl, so locatedthat when it rises upon the completion of a load in the bucket 1 it willengage the lever 37 and liftit from the post 38, thereby breakingthecircuit through the magnet 32 and releasing the arm 28, and thuspermitting the complete closing of the valve 17. The upward movement ofthe projection -11 should be limited by a suitable stop 40.

The support 10 will obviously tend to rise as soon as any considerableportion of material after it has been weighed has been discharged fromthe bucket 1, and since such motion wouid result in prematurely openingthevalve l7 Iprovide means for locking said support in or near itslowest position until the bucket has discharged its load completely. Tothis end I provide a hook 42, pivoted to the framework of the machineand arranged to engage a projection 43 upon the support 10 when in itslowest position. Said hook 4-2 is connected, as by means of an arm 4stand a link 45, to a lever lo, pivoted near the bottom of the machine andcarryinga plate 47, which IIO projects intothepath of the fallingmaterial dumped from the bucket 1. A weight 48 is usually provided .onthe rear end of the lever 46 and normally overbalances the plate 47, andthereby holds the same in a nearly horizontal position, the book 42being thus held out of engagement with the projection 43. Thus when thebucket is dumped the first portions of the material discharged therefromwill by falling upon the plate 47 and over-balancing the weight 48operate to lock the support 10, as above described, and said supportwill not be released nor permitted to open the valve 17 to any extentwhatever until the charge last delivered to the bucket has been dumpedtherefrom and has fallen away from the plate 47, thereby giving thebottom of the bucket time to close.

It will be understood that the bottom of the bucket 1 when unlatched iscaused to open by the weight of the material resting upon it, and theunlatching of said bottom is effected by the engagement of a fixed stud49 with the free end of the latch 8 during the downward movement of thefilled bucket. In order to insure a suflicient movement of the bucketfor this purpose without interfering with the accurate balancing of thescale-beam 2 and to prevent the premature unlatching of said bottom, Iprovide means for interrupting the downward movement of the support 10until the final closing of the valve occurs and for then releasing saidsupport and permitting it to finish its downward movement. For thispurpose I prefer to employ an arm 24, secured to the shaft 18 andprovided at its lower end with a flange 25, formed on the arc of acircle having said shaft for its center. A roller 26 is secured to apost 27, projecting upward from the table 10, and is arranged to engagethe flange 25 when the support 10 has moved downward through a portionof its path, whereby said support will be suspended and its downwardmotion will be arrested until the final closing of the valve 17 iseffected, at which time the flange 25, being attached to the shaft 18,will be moved from under the roller 26, and the support 10 and thebucket 1 will drop to their lowest positions. The unbalanced weight ofthese parts will be amply suflicient to cause the unlatching of thebottom of the bucket, and this action will be performed independently ofthe scale-beam 2 and after the same has caused the final closing of thevalve, so that the accuracy of the weighing operation cannot be affectedthereby. I have shown at 50 in dotted lines a hopper which may beemployed to receive the weighed material and to conduct it to anydesired receptacle.

I will now describe a complete cycle of operations of a machine such asabove described, starting from the position shown in Fig. 2. In saidfigure the parts are shown in that position in which a load of materialhas been weighed and dumped from the bucket and the last portions of theload are holding down by their weight the plate 47, whereby the hook 42is held in engagement with the stud 43, so that the support 10 and itsconnected parts are prevented from rising. As soon as the material hasfallen away from the plate 47 said plate will be raised by the weight 48and the hook 42 will be disengaged from the stud 43, whereupon thesupport 10, carrying the scale-beam 2 and the bucket 1, will 1e movedupward against the stop 14 by means of the spring 12 or counterbalance63. During this upward motion the bottom of the bucket 1 will be closedby the weight 51 and latched. As the support 10 moves upward it willraise the roller 26 above the level of the flange 25 before any motionof said flange or of the other parts attached to the shaft 18 can occurbecause of the slot in the link 22; but the furthermotion of thesupportlO will bring the bottom of the slot in the link 22 into contactwith the pin 21, whereupon the valve 17 and the other parts attached tothe shaft 18 will be moved into the position shown in Fig. 3. The arm 28will be drawn upward by the spring 33as fast as such motion is permitteduntil the armature 29 isbroughtinto contact with the magnet Meanwhilethe circuit of this magnet will have been completed by there'e'stablishment of the contact between the lever 37 and the post 38,since the weighted end of the scale-beam will fall as soon as a load hasbeen dumped from the bucket, so that the armature 29 will be held by themagnet as soon as it has been brought into contact therewith) The partsbeing now. in the position shown in Fig. 3, in which the valve 17 isopen to its fullest extent, a large stream of material will be deliveredfrom the chute 16 to the bucket 1 until a sufficient amount of materialhas passed into said bucket to overcome the force of the spring 12 orcounterweight- 63, which will occur when an amount slightly less thanthe desired load has been received by the bucket 1. At this point thesupport 10, with the parts carried thereby, will begin to descend, andsuch motion will continue until the roller 26 rests upon the flange 25of the arm 24. During this down ward movement the valve 17 will beclosed by the spring 19 as fast as such action is permitted by themotion of the link 22 until the position shown in Fig. 1 has beenreached, the valve 17 then being nearly closed, its closing motion beingarrested at this point by the engagement of the lug 31 with the hookedend of the arm 30, which will be prevented from moving by the magnet 32.A small or drip stream of material will now flow through theslightly-open valve until the full load has been completed, whereuponthe scale-beam 2 will be tilted, thereby breaking at the post 38 theenergizing-circuit through the magnet 32 and releasing the armature 29and arm 28, whereby the valve 17 will also be released and willinstantly be closed by the spring 19. Simultaneously with the finalclosing motion of the valve the flange 25 will be moved from IIO underthe roller 26, and thereupon the support 10 will drop into the positionshown in Fig. 2, in which position it will be supported by the stop 15.During this downward movement the latch 8 will be lifted by engagingwith the pin 49, whereupon the weight of material in the bucket willforce open its bottom, and said material will be dumped therefrom, andby falling upon the plate 47 will depress the same, and thus lock thesupport 10 in its lowest position, the parts being thus brought backinto the position shown in Fig. 2.

In Fig. 4 l have shown a modification in which the electrical device forreleasing the valve has been replaced by a mechanical trip for the samepurpose. In this modification an arm 54 is secured to the valve 17, andupon an extension 55 of the framework of the machine a lever 56 ispivoted, being provided with a projection or shoulder 57, adapted toengage the free end of the arm 54 when the valve is in its nearly-closedor drip-stream position, as shown. A pawl 58 is pivoted to the bottom ofthe lever 56, and upon the rear end of the scale-beam 2 is a lug 59,adapted to engage the pawl 58 when that end of the scale-beam is in itslowest position. A spring 60 normally holds the pawl 58 against aprojection 61 upon the lever 56. As thus constructed when the fullweight in the bucket 1 has been completed and the scale-beam 2 isthereby caused to tilt the lug 59 will be moved out of the path of thelever 56, and the upward pressure of the arm 54 upon the shoulder 57will swing said lever until said arm 54 is free to rise, whereupon thevalve 17 will be instantly closed by the spring 19, the remaining partsof the machine being precisely similar to those shown in Figs. 1, 2, and3 and their mode of operation being the same. Upon the return of thesupport 10 to its up" perniost position the valve 17 will be opened, andthe arm 54 will be moved downward sufficiently far to allow the lever 56to be moved under the action of a spring 62 into position to engage saidarm 54 again when the valve is partially closed into the drip-streamposition.

While I have illustrated my invention in connection with adumping-bucket, it will be obvious that this feature is not essential tothe action of the remaining parts of the apparatus and that there may besubstituted for it ascale-pan upon which any desired receptacle may beplaced. My invention may also be modified in respect to many other partsand details, as will be apparent, particularly in respect to the form ofthe valve 17 and the means for controlling its closing movements. Shouldthe weight 48 be omitted, the hook 42 will not be operated to releasethe support 10 after the material has flowed off the plate 47, and itwill then be necessary to operate said hook by hand. In place of theparts 45,46, and 47a spring may be applied to the hook 42, tending tothrow said hook forward, which will then have to raaaoo be unhooked byhand, as in the case of the construction last referred to. This form ofconstruction will be convenient when it is desired to weigh only asingle portion of material and continuous operation is not desired. Incase it is not desired to cause a partial closing of the valve 17 priorto the completion of the load the armature 29 will be secured directlyto said valve or to some part" movable therewith.

In Fig. 6 is shown another modification of myinvention according towhich the support 10 is positively connected to the valve 17 by means ofa link 75, so that said valve will be opened and closed directly by themovement of said support. The excess of the weight of the counterbalance63 over the empty bucket 1 provides a means for opening the valve 17, asin the case of the other forms of the machine, while the excess of theWeight of the filled bucket overthe counterbalance provides power forclosing the valve, the latter excess weightbeing accumulated after thevalve 17 has been closed into the drip-stream position, as shown in Fig.6, since the parts are retained in that position by the magnet 32, asabove explained. In other words, the accumulation of the materialnecessary to complete the load provides a quickly-acting forceconstantly tending to close the valve 17 and operating so to do upon thebreaking of the circuit through the magnet 32.

In Fig. 6 I have shown also a device for locking the operative parts ofthe machine after a predetermined number of operations. My preferredconstruction comprises a shaft 74, to which is attached at its inner enda hook 69, while upon the outer end of said shaft is secured a weightedarm 66. A hook 70 is secured to the under side of the support 10 inposition to be engaged by the hook 69 when said support is in its lowestposition. Turning loosely upon the shaft 74 is a ratchet 68, secured toa plate 64, from which plate project a number of pins 65. An arm 67,secured to the support 10, is provided with projecting ears 72 and 73,so located as to form, with the pins 65, a species of escapement, actingto permit the passage of one pin 65 upon each operation of theweighing-machine. The arm 66 is also provided with a spring-pawl 71,arranged to engage the teeth of the ratchet 68, so that by reason of itsweighted end said arm will tend to turn the ratchet 68 and will turn itthrough the space between two of the pins 65 whenever one of said pinsis permitted by an oscillation of the support 10 to pass the escapementformed by the ears 72 and 73. By lifting the arm 66 sufliciently tocause the pawl 71 to engage the second tooth passed by it as it is movedalong the ratchet 68 the hook 69 will be moved away from the hook 70sufficiently to allow the weighing-machine to complete two operationsbefore said book 69 will again engage the hook 70, and when this occursthe further operation of the machine will be arrested. If the arm 66 beraised sutiiciently to move the pawl '71 past a different number ofteeth, a corresponding number of operations will be performed by themachine before it is again locked. It will be apparent that this lockingdevice is applicable to all of the modifications of my invention hereinshown and,iu fact, to any weighing-machine which contains a movablesupport similar in its mode of operation to tny support 10.

In case it is desired to have the machine perform a large number ofoperations before stoppingthe locking device above described may bemodified by providing the shaft 74 with means, such as a spring, forrotating it to a greater extent, since in such case it may be necessaryto'cause the arm 66 to perform nearly a complete revolution.

I claitn as my invention 1. In an automatic weighing-machine, thecombination of a vertically-movable support, a scale carried thereby, asupply-chute and. a valve controlling the same, valve-opening meansarranged to be operated by said support on its upward movement only,means independent of the support constantly tending to close the valve,a valverestraining device, and means operative with the poising of thescale for permitting the closing of the valve.

2. In an automatic weighing-machine, the combination of avertically-movable support, a scale carried thereby, a supply-chute anda valve controlling the same, valve-opening connections between saidsupport and valve, means constantly tending to close the Valve, a magnetand valve-restraining means movable with the armature thereof, and meansoperative with the poising of the scale for deenergizing said magnet.

3. In an automatic weighing-machine, the combination of a pivotedsupport, a scale carried thereby and located wholly on one side of theaxis on which said support turns, a supply chute and a valve controllingthe same, means constantly tending to close said valve, avalve-restraini ng device,valve-opening connections between the supportand valve, and means operative with the poising of the scale forpermitting the closing of the valve.

4. In an automatic weighing-machine, the combination of averticallyunovable support, a scale carried thereby, a supply-chute anda valve controlling the same, valve-opening means arranged to beoperated by said support on its upward movement only, means independentof the support constant-1y tending to close the valve, means forarresting the closing movement of the valve after a partial closingthereof has been effected, and means operative with the poising of thescale for permitting the closing of the valve.

5. In an automatic weighing-machine, the combination of a supply-chuteand a valve controlling the same, means constantly tending to close saidvalve, means for arresting the valve when partly closed, comprising amagnet and a stop movable with the armature thereof, a movable supportand connections between the same and said valve for opening the latter,a scale carried by said support, and means for denergizing said magnetnpon the poising of the scale.

6. In an automatic weighing-machine, the combination of a supply-chuteand a valve controlling the same, means constantly tending to close saidvalve, a magnet and valverestraining means movable with the armaturethereof, a movable support and a valve-opening-link connected tosaidsupport and slotted at its upper end, a pin carried by the valve andmovable in said slot, a scale carried by said support and means fordenergizing said magnet upon the poising of the scale.

7. In an automatic weighing-machine, the combination with a movablesupport and a scale carried thereby, of a shaft, a supplycontrollingvalve secured thereto, an electromagnet included in circuit withacircuitbreaker adapted to be operated by a movement of said scale, anarm journaled on said shaft and provided with an armature and with ahooked end adapted to engage a lug on said valve and thereby hold thesame in a partlyclosed position, means for opening said valve adapted tobe operated by the upward movement of said support, and means constantlytending to close said valve.

8. In an automatic weighing-machine, the combination of a movablesupport, a scalebeam carried thereby, a receptacle carried by saidscale-beam and having a bottom adapted to open and close, a latcharranged to lock said bottom closed and to be released by the downwardmovementof the receptacle, means for arresting the downward movetnent ofsaid support prior to the com pletion of a load in the receptacle, andmeans for releasing said support when said load has been completed.

9. In an automatic weighing-machine, the combination of asupply-controlling valve, a movable support carrying a scale-beam andprovided wit-h an arm and a roller, a receptacle carried by saidscale-beam and provided with a hinged bottom arranged to be opened uponthe downward movementof thesupport, means for closing said valve uponthe completion of a load, and an arcshaped flange movable with saidvalve and arranged to support said roller when the valve is open.

10. In an automatic weighing-machine, the combination of a supply-chuteand a valve controlling the same, a movable support, a scale carriedthereby, means operative with the upward movement of said support foropening said valve, and means for automatically locking said support inits load-discharging position after-a predetermined number ofoperations.

11. In an automatic weighing-machine, the combination of a supply-chuteand a valve controlling the same, a movable support, a scale-beamcarried thereby, a receptacle suspended on said scale-beam, meansoperative with the upward movement of said support for opening thevalve, a latch arranged to lock said support when in itsload-discharging position, a plate operatively connected to said latchand located below the bottom of said receptacle and in the path of thematerial discharged therefrom, and means for lifting said plate afterthe material has fallen away from the same.

12. In an automatic Weighing-machine, the combination with a valve andmeans constantly tending to close the same, of a movable support, ascale carried thereby, valveopening means comprising a link pivoted atone end to said support and slotted at its other end to engage a pincarried by said valve, and means operative with the tilting of saidscale for releasing said valve.

13. In an automatic Weighing-machine, the combination of a chute 16, avalve 17, means constantly tending to close said valve, an arm 28loosely pivoted on the axis of said valve and carrying an armature andan arm 30 provided with a hooked end adapted to engage a lug 31 on saidvalve, a magnet 32 adapted when energized to hold the valve in apartly-open position, a counterbalanced su pport carryinga scale, avalve-opening link 22 pivoted to said support and operatively connectedto said valve, a circuit-breaker included in the circuit of said magnetand adapted to be operated by the movement of said scale, and a latchadapted to lock said support after it has been caused to descend by thecompletion of a load.

14. In an automatic Weighing-machine, the

combination with weighing mechanism of an automatic locking devicecomprising a rotatable shaft carrying a locking member adapted to engagea portion of the Weighing mechanism and thereby lock the same againstfur ther movement, a disk mounted on said shaft and arranged to berotated by the same, an escapement operative with the weighing mechanismfor permitting a step-by-step rotation of said disk, and means forvarying the initial relative position of said disk and shaft.

15. In an automatic Weighing-machine, the combination with Weighingmechanism of an automatic locking device comprising a shaft carrying ahook and a Weighted arm, a disk mounted loosely upon said shaft andprovided with a ratchet and a series of pins, a pawl carried by said armand adapted to engage said ratchet, and a pair of lugs secured to andmovable with the Weighing mechanism and forming an escapement for saidpins.

EDWARD G. THOMAS.

Witnesses:

E. 0. FORD, GEO. B. GLIDDEN.

